Short crack R-curves in ferroelectric and electrostrictive PLZT

被引：20

作者：

Chen, W ^{[1
]}

Lupascu, DC

Rödel, J

Lynch, CS

机构：

[1] Georgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USA

[2] Tech Univ Darmstadt, Dept Mat & Geosci, D-64287 Darmstadt, Germany

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2001年 / 84卷 / 03期

关键词：

D O I：

10.1111/j.1151-2916.2001.tb00704.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This work describes the measurement of R-curve behavior in ferroelectric ceramics using four-point bend specimens with controlled semielliptical surface cracks. The results are compared for two compositions of lead lanthanum zirconate titanate. One exhibits ferroelastic behavior, the other electrostrictive linear elastic behavior. R-curves are measured in the crack length regime of 0.1 to 0.8 mm, The ferroelastic composition displays a toughness increase from 0.5 to 1.2 MPa.m(1/2) The linear elastic composition displays a flat R-curve. The R-curve behavior is attributed to ferroelastic toughening.

引用

页码：593 / 597

页数：5